"Glee" Debuts Trailer for Cory Monteith Tribute Episode

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The late actor Cory Monteith is seen here in promotional art for the Farewell to Finn episode on "Glee."

Grab a tissue. You'll need it.

"Glee's" tribute episode to Cory Monteith is set to air next Thursday, Oct. 10, and now fans can get a sneak peek of the characters mourning the death and celebrating the life of his character Finn Hudson in the new "Farewell to Finn" promo.

The 30-second clip shows the emotional cast putting together a memorial for Hudson as Lea Michele sings the Adele track "Make You Feel My Love" while trying not to choke up.

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"I locked [the episode] today. It was incredibly difficult to work on. It was very difficult to shoot," Ryan Murphy told reporters.

"I mean, the interesting thing about that show is that those actors and the creators really, really loved Cory. The episode is called 'The Quarterback,' and you know Cory really was that, to that group of people and to me particularly. There was nobody on that crew that did not like Cory."

He continued, "I've never seen a crew that you can't continue shooting because they've left the room sobbing. It was very hard...It was rough. It was very rough. It was very rough with Lea Michele...but I'm very proud of it. I think the performances are quite stunning. People still are not over it. It's still very, very difficult."

Stars Steppin' Out

Several cast members who are no longer series regulars on the show returned to appear in the episode, including Amber Riley (Mercedes), Harry Shum Jr. (Mike Chang), Mark Salling (Puck) and Jayma Mays (Emma), along with Dot-Marie Jones (Coach Bieste), Kurt's father Mike O'Malley (Burt Hummel) and Finn's mother Romy Rosemont (Carole Hudson-Hummel).